Gin rib



Jan. 10, 1939. l G. c. MORGAN 2,143,657

GTN RIB Filed Oct. 5,' 1936 7/3 Z Zl 52/4 xcy INVENTQR 4202 9; [3 Morgan 7 ATTORNEYS Patented Jan. 10, 1939 UNITED STATES om RIB George 0. Morgan, Birmingham, Ala., assignor to Continental Gin Company, a. corporation of Delaware Application October 5,

1 Claim.

My invention relates to certain new and useful improvements in gin ribs, which are particularly, but not exclusively, adapted for use in linter gins.

The chief object of my invention is to design the rib with simple, accurate and effective means whereby it can be both centered and rigidly mounted against relative displacement under service conditions in the grate fall or linter breast.

Linter gin ribs are set with very close clearances and to be efiicient and practicable they must be capable of ready interchange and replacement with assurance that the new ribs will seat accurately on exact centers and will each hold its relative clearance on both sides with the adjacent ribs thereby to maintain the required saw clearances.

As the means for centering and mounting the upper end of my improved ribs, I form thereon a stud which is cylindrical or rounded to fit with a snug fit into any one of a series of similar holes bored to receive it in the upper rib rail element, and this rib stud rises from a fiat seat shaped to abut squarely against a fiat face of the upper rib rail element in which the rib centering holes are bored.

In a companion application, Serial No. 88,950, I have described and claimed the combination of means for the mounting of my improved rib at both ends in the linter breast. In this application I claim the construction of the rib per se.

My invention further comprises the novel details of construction and arrangement of parts which, in their preferred embodiment only, are illustrated in the accompanying drawing, Wherein- Fig. 1 is a side elevation of my improved gin rib with its associated mounting elements in the linter breast;

Fig. 2 is a plan view enlarged of the upper end of Fig. 1;

Fig. 3 is an enlarged side elevation of said upper end; and

Fig. 4 is a view in elevation of the lower flattened ends of a pair of adjacent ribs, showing the spacing thereof.

Similar reference numerals refer to similar parts throughout the drawing.

In the embodiment of my invention illustrated, the upper rib rail element 5 is shown in cross section, as is also the lower rib rail ii with its associated liner strip 1 and clamp p1ate8, which latter is recessed to receive and clamp the lower centering ends 9 of the series of ribs in position.

This end 9 of the rib is enlarged with its offset 1936, Serial No. 104,012

parallel side edges adapted to abut and thus to space the lower ends of the ribs.

The rib can have any suitable cross section, it being shown with a working face Ill and a reduced tapered under or back portion I l.

The upper end of the ribs working face terminates in a bevelled shoulder l2 that merges into a fiat seat I3 from the back end of which rises a, cylindrical stud M, the rear edge of which merges symmetrically into the rounded rear edge 10 it of the upper end of the rib. The seat I3 is preferably disposed normal to the axis of the stud l4, and the latter is preferably made round to fit with a snug, close fit into the hole 18 provided for it in the faced seat I! provided on the under edge of the upper rib rail flange IS. The lower face I! of this flange also stands normal to the axis of the stud and thus the rib shoulder forming the seat I 3 forward of the centering stud will abut flush against it. 20

By reference to Fig. 1 it will be seen that a line projected from the under or back face of the rib end 9 passes forwardly of, and substantially out of line with the centering stud, but parallel therewith. As a result of this, when a rib is clamped in position in the seats provided for its upper and lower ends, it will be prevented from turning or rocking laterally out of position, and therefore will remain rigidly set in correct operating position until freed from its end mountings.

It is a simple matter for the holes [8 to be drilled with accurate alignment and centering in the upper rib rail seat I! and all be of uniform size. The flange IQ of the upper rib rail can be easily faced so as to produce a uniform fiat seat I! with which the rib shoulder l3 will have flush engagement. It is also comparatively simple to turn a true stud l4 that will fit snugly in any one of the centering holes 18. All these provisions for the centering of ribs can be accomplished with great accuracy at low cost, and the ribs will be held positively against displacement at their upper ends opposite the saw teeth. The lower rib ends 9 can be very simply and economically ground or faced to true size so that they will abut as they rest on the lower rib rail, each having a width corresponding to the spacing between centers of the holes I8 in the upper rib rail.

Thus, when the clamp plates 8 are screwed home, the lower rib end will provide ample upper and lower surfaces engaged between the clamping faces to hold the rib against cocking sidewise, and to thrust and hold its shoulder l3in firm engagement with the upper rib rail seat ll. As the pressure from the roll and thrust from the linting action of the saws come on the upper end of the rib it is brought under tension and its shoulder I3 will transmit these working stresses from the stud to the rib rail seat l1, thereby greatly strengthening the rib against fracture.

The stud, as stated, is preferably cylindrical, but it may be oval or ovoid, so long as when fitted into the hole in the upper rib rail it will serve to accurately center the upper end of the rib coaxially with the hole and leave suificient of the seat l3 to abut the rib rail seat [7. The bevelled face I2 is provided so that material working down the liner plate (not shown) of the roll box will slip therefrom on to this bevelled face l2 and will not tend to hang or accumulate at the upper end of the rib.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications, without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claim.

What I claim is:

A linter gin rib having one end flattened to form a side seat adapted to overlap a rib rail and its other end squared off to form an end seat adapted to abut endwise against a faced rib rail seat, and a rounded stud disposed at the rear of the end seat leaving a shoulder disposed forwardly thereof and rising above said end seat and adapted to fit snugly into a hole bored into said faced seat.

GEORGE C. MORGAN. 

